.site-chrome { --color-text: #18181b; --color-text-muted: #52525b; --color-text-subtle: #71717a; --color-border: #e4e4e7; --color-accent: #7c3aed; --color-accent-hover: #6d28d9; color: var(--color-text); font-family: Inter, system-ui, sans-serif; }
.site-chrome a { text-decoration: none; }
.site-chrome a:hover { text-decoration: underline; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--color-border);
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  color: #fff;
  background: var(--color-accent-hover);
  border-radius: 0.6rem;
  font-weight: 700;
  transform: translateY(-180%);
}
.skip-link:focus {
  color: #fff;
  text-decoration: none;
  transform: translateY(0);
}

.site-header .header-inner {
  max-width: 72rem;
  margin: 0 auto;
  min-height: 4rem;
  padding: 0.55rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-main {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  width: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  gap: 0.55rem;
  font-weight: 650;
  font-size: 0.98rem;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.brand:hover { text-decoration: none; color: var(--color-text); }
.brand .accent { color: inherit; }
.brand-mark {
  position: relative;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 0.48rem;
  background: var(--color-accent);
  box-shadow: none;
  flex-shrink: 0;
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 0.46rem 0.38rem 0.5rem;
  border: 1.5px solid #fff;
  border-radius: 0.22rem;
}
.brand-mark::after {
  content: "";
  position: absolute;
  right: 0.4rem;
  bottom: 0.36rem;
  width: 0.3rem;
  height: 0.3rem;
  background: var(--color-accent);
  border-right: 1.5px solid #fff;
  transform: rotate(35deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.82rem;
}
.nav-links a {
  color: var(--color-text-muted);
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-chat {
  display: inline-flex;
  align-items: center;
  min-height: 2.7rem;
  background: var(--color-accent);
  color: #fff !important;
  font-weight: 600 !important;
  padding: 0.55rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.82rem;
  box-shadow: none;
}
.nav-chat:hover {
  background: var(--color-accent-hover);
  color: #fff !important;
  text-decoration: none;
}
.site-footer {
  margin-top: 4rem;
  padding: 2.5rem 1.25rem 3rem;
  border-top: 1px solid var(--color-border);
  background: #fff;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.site-footer .footer-inner {
  max-width: 72rem;
  margin: 0 auto;
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.15rem;
  font-size: 0.85rem;
}

/* Grouped footer. Carries the four product landing pages and the research dataset
   sitewide, so the pages that have to rank are not out-linked by the privacy policy. */
.footer-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 1.5rem 2rem;
  margin-bottom: 1.75rem;
}
.footer-group h2 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin: 0 0 0.6rem;
}
.footer-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
  font-size: 0.85rem;
}

/* Per-page content date. Matches this URL's sitemap <lastmod> and the dateModified in
   its JSON-LD — one fact, three surfaces. */
.page-updated {
  max-width: 72rem;
  margin: 2.5rem auto 0;
  padding: 0 1.25rem;
  font-size: 0.8rem;
  color: var(--color-text-subtle);
}
.site-footer .disclosure {
  font-size: 0.82rem;
  line-height: 1.6;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}
.site-footer .disclosure strong { color: var(--color-text); }
.site-footer .footer-meta {
  font-size: 0.78rem;
  color: var(--color-text-subtle);
}
.site-footer a { color: var(--color-text-muted); }
.site-footer a:hover { color: var(--color-accent); }
@media (max-width: 1080px) { .nav-links a.nav-optional { display: none; } }
@media (max-width: 640px) { .site-header .header-inner { padding: 0.65rem 1rem; } .nav-links { gap: 0; } .nav-links a:not(.nav-chat) { display: none; } .nav-chat { padding: 0.4rem 0.9rem; font-size: 0.82rem; } }